Creative children's science technology small production materials invention tank science model student experimental equipment
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Description
Product information
Product packaging: opp bag
Package size: 14 x 20 x 5cm
Net weight: 115g
Package size: 13 x 10.5 x 8cm
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Experimental principle: This is a typical switch circuit. The battery provides power. The switch controls the on/off of the current. When the switch is turned on, the switch current flows...